package bbs.mvc.Servlet;

import bbs.mvc.Beans.DBUtils;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.List;

@WebServlet(name = "ADDServlet", value = "/add-servlet")
public class AddPostServlet  extends HttpServlet {

    private static final long serialVersionUID = 1139723442711986380L;
    private static final int MEMORY_THRESHOLD   = 1024 * 1024 * 3;  // 3MB
    private static final int MAX_FILE_SIZE      = 1024 * 1024 * 40; // 40MB
    private static final int MAX_REQUEST_SIZE   = 1024 * 1024 * 50; // 50MB
    // 上传文件存储目录
    private static final String UPLOAD_DIRECTORY = "IMG";


    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        this.doPost(request, response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        String title     = request.getParameter("title");
        String author   ;
        String content = request.getParameter("content");
        String picpath = request.getParameter("picpath");
        // 检测是否为多媒体上传
        if (!ServletFileUpload.isMultipartContent(request)) {
            // 如果不是则停止
            PrintWriter writer = response.getWriter();
            writer.println("Error: 表单必须包含 enctype=multipart/form-data");
            writer.flush();
            return;
        }

        // 配置上传参数
        DiskFileItemFactory factory = new DiskFileItemFactory();
        // 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
        factory.setSizeThreshold(MEMORY_THRESHOLD);
        // 设置临时存储目录
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));

        ServletFileUpload upload = new ServletFileUpload(factory);
        // 设置最大文件上传值
        upload.setFileSizeMax(MAX_FILE_SIZE);
        // 设置最大请求值 (包含文件和表单数据)
        upload.setSizeMax(MAX_REQUEST_SIZE);
        // 中文处理
        upload.setHeaderEncoding("UTF-8");


        // 构造临时路径来存储上传的文件
        // 这个路径相对当前应用的目录
        String uploadPath = request.getServletContext().getRealPath("./") + File.separator + UPLOAD_DIRECTORY;
        // 如果目录不存在则创建
        File uploadDir = new File(uploadPath);
        if (!uploadDir.exists()) {
            uploadDir.mkdir();
        }

        String pics = "";
        try {
            List<FileItem> formItems = upload.parseRequest(request);
            if (formItems != null && formItems.size() > 0) {
                // 迭代表单数据
                for (FileItem item : formItems){
                    System.out.println(item.getFieldName());
                }
                for (FileItem item : formItems) {
                    // 处理不在表单中的字段
                    System.out.println(item.getFieldName());
                    if (!item.isFormField()) {
                        String fileName = new File(item.getName()).getName();
                        String filePath = uploadPath + File.separator +title+".jpg";
                        File storeFile = new File(filePath);
                        // 在控制台输出文件的上传路径
                        System.out.println(filePath);
                        System.out.println("filePath已经读入");
                        // 保存文件到硬盘
                        item.write(storeFile);
                        pics += fileName + ",";
                        picpath="/IMG/"+title+".jpg";
                    } else {
                        if (item.getFieldName().equals("title")) {
                            title = item.getString("UTF-8");
                            System.out.println("title已经读入:");
                            System.out.println(title);
                        }
                        if (item.getFieldName().equals("content")) {
                            content = item.getString("UTF-8");
                            System.out.println("content已经读入");
                        }
                    }
                }
            }
        }catch (Exception e) {
            e.printStackTrace();
        }
        HttpSession session = request.getSession(true);
        author= (String) session.getAttribute("user");

        try {
            DBUtils.insert(title,author,content,picpath);
            response.sendRedirect("./admin/Arstartes.jsp");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

}